264 



Although the birds of East, Central, and West Africa vary- 

 greatly among themselves, I do not see how any races can be 

 maintained other than fulleborni of northern Nyasaland, Katan- 

 ga, and Northern Rhodesia, west to Benguella. Thus, Gylden- 

 stolpe {loc. cit.) finds that specimens of croceus from ' . . . . the 

 Central African Lakes District, Uganda, east to Elgon and 

 Kavirondo, are, however, somewhat larger than those from 

 Kenya Colony and Tanganyika Territory . . . .', but he 

 finds that his Congo birds are referable to typical croceus, of 

 which he had seen two Senegalese specimens. On the other 

 hand, van Someren (1922, p. 179) writes that '. . . . eastern 

 birds are larger than typical ones .... examined. More 

 material required.' I have examined a series of some 28 birds 

 from Gaboon, Uganda, Ruanda, Kenya Colony, and Tangan- 

 yika Territory, besides vulturnus of Natal, and do not find any 

 constant size differences that are correlated with geography. 



The races of the Yellow-throated Long-claw may be summa- 

 rized as follows: 



M. croceus croceus (Vieillot) 



Senegal, Nigeria, Gold Coast, and Bahr el Ghazal district of 

 the Sudan, south through Cameroon to Gaboon, through the 

 Belgian Congo to the northern part of the Katanga, and through 

 Uganda and Kenya Colony to Ruanda, Tanganyika Territory 

 (except the southwestern part), and Mozambique. Just how 

 far south this race extends is not yet definitely known, but it 

 probably intergrades with vulturnus in southern Mozambique 

 and Gazaland. 



M. croceiis vulturnus 



Natal and adjacent parts of the Transvaal, Pondoland, the 

 eastern Cape Province (where, however, it is rare), Zululand, 

 probably Swaziland, and Amatongaland in southern Mozam- 

 bique, whence, however, I have seen no material. 



M. croceus fulleborni Reichwow 



From the Unika highlands north of Lake Nyasa, and adjacent 

 parts of southwestern Tanganyika Territory, west through the 

 Katanga and Northern Rhodesia to Benguella in Angola. 

 Sclater (1930, p. 348) writes that this may be a distinct species 



